Add config for "Number of Spots" and "Spot Age" values used in the web UI. Closes #79

webassets/js/spots.js

@@ -287,6 +287,13 @@ function loadOptions() {
         generateMultiToggleFilterCard("#mode-options", "mode_type", options["mode_types"]);
         generateMultiToggleFilterCard("#source-options", "source", options["spot_sources"]);
 
+        // Populate the Display panel
+        options["web-ui-options"]["spot-count"].forEach(sc => $("#spots-to-fetch").append($('<option>', {
+            value: sc,
+            text: sc
+        })));
+        $("#spots-to-fetch").val(options["web-ui-options"]["spot-count-default"]);
+
         // Load settings from settings storage now all the controls are available
         loadSettings();